NAHP NRCMA Exam - Topic 3 Question 28 Discussion

Actual exam question for NAHP's NRCMA exam

Question #: 28
Topic #: 3

[All NRCMA Questions]

When using a microscope with a 10X ocular and the 40X objective in place, the total magnification is

A50X

B40X

C30X

D400X

Show Suggested Answer

Suggested Answer: D

When using a microscope with a 10X ocular lens and a 40X objective lens in place, the total magnification is 400X. This is calculated by multiplying the magnification of the ocular lens by the magnification of the objective lens (10X * 40X = 400X).

by William at Aug 13, 2025, 10:50 PM

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Wilda

5 months ago

I thought it was 50X at first, but it's 400X.

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Jeff

5 months ago

Wait, is it really that high? Sounds surprising!

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Tu

5 months ago

Definitely 400X, no doubt about it.

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Bernadine

6 months ago

10X times 40X equals 400X, simple math!

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Daniela

6 months ago

Total magnification is 400X!

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Vincenza

6 months ago

I recall that the total magnification is usually a straightforward calculation, but I might be mixing it up with something else. Is it really 400X?

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Juliann

7 months ago

I practiced a similar question, and I feel like the answer is definitely not 50X or 40X. It has to be higher than that.

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Julio

7 months ago

I'm not entirely sure, but I remember something about total magnification being a simple multiplication. Could it be 400X?

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Willard

7 months ago

I think the total magnification is calculated by multiplying the ocular and objective lenses, so it should be 10X times 40X, right?

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Willodean

7 months ago

Hmm, I'm not sure about this one. I know the formula, but I'm second-guessing myself on the actual numbers. I think I'll just go with my first instinct and select 400X, but I'm not 100% certain.

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Rodney

7 months ago

The total magnification is 400X. That's easy to calculate - the ocular is 10X and the objective is 40X, so the total is just 10 * 40 = 400X. I'm pretty confident in that answer.

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Denny

7 months ago

I'm a bit confused on this one. I know the total magnification is the product of the ocular and objective, but I'm not sure if that's 400X or something else. I'll have to double-check the formula.

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Carey

8 months ago

Okay, let's think this through step-by-step. The question is asking about the total magnification when using a 10X ocular and a 40X objective. To find the total magnification, we multiply the ocular and objective magnifications, so that should be 10X * 40X = 400X.

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Jolanda

8 months ago

Wait, is this a trick question? I'm going with C, just to be safe. 30X sounds about right.

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Brittni

8 months ago

I agree with James, the total magnification is calculated by multiplying the magnification of the ocular lens (10X) with the magnification of the objective lens (40X). So it's D) 400X.

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